Stock Options - Schedule of Stock Option Activities (Details) - $ / shares	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Number of shares, Beginning Balance	749,000	635,000	635,000
Number of shares, Granted			172,000
Number of shares, Cancelled or expired	(27,799)		(13,000)
Number of shares, Exercised	(55,201)		(45,000)
Number of shares, Ending Balance	666,000		749,000
Number of shares Exercisable, Ending Balance	423,000
Exercise price per share, Granted			$ 2.44
Weighted average exercise price, Beginning Balance	$ 2.42	$ 1.35	1.35
Weighted average exercise price, Granted			2.44
Weighted average exercise price, Cancelled or expired	2.45		2.75
Weighted average exercise price, Exercised	1.55		0.88
Weighted average exercise price, Ending Balance	2.66		2.42
Weighted average exercise price Exercisable, Ending Balance	2.44
Minimum [Member]
Exercise price per share, Beginning Balance	0.75	0.75	0.75
Exercise price per share, Cancelled or expired	1.42		2.44
Exercise price per share, Exercised	0.75		0.75
Exercise price per share, Ending Balance	1.42		0.75
Exercise price per share Exercisable, Ending Balance	1.42
Maximum [Member]
Exercise price per share, Beginning Balance	4.13	$ 1.75	1.75
Exercise price per share, Cancelled or expired	3.46		3.46
Exercise price per share, Exercised	3.46		1.05
Exercise price per share, Ending Balance	4.13		$ 4.13
Exercise price per share Exercisable, Ending Balance	$ 4.13